Drop idling n20 cold start

razcat13 · 03-29-2024, 03:38 PM

Please can someone help me?
I have a BMW 320, n20 engine, 184 HP, on the first cold start, only when decelerating does the idling decrease, drop, after which it recovers. The rest of the starts work fine.
It has no error codes!
For this problem, several parts were changed without success:
-Thermostat
-spark plugs
- Bosch injectors
-original BMW distribution
- engine temperature sensor
-MAF sensor Bosch
-pvc valve
-oxygen sensor 1 Bosch
-fuel rail pressure sensor
- high pressure pump
-o-rings changed at intake
-rocker cover gaskets changed
All consumables and oil changed at 6000 km
Premium fuel and BMW additive

fe7565 · 03-30-2024, 04:34 PM

How did you check the error codes? Did you use ISTA+? After replacing components such as you described, the ECUs need to be reset.

Did you try to reset the throttle and transmission adaptations with ITSA+?

Not sure if these methods work:

https://www.bmwfanatics.co.za/thread...n-reset.89895/
https://f30.bimmerpost.com/forums/sh...13&postcount=2

razcat13 · 04-02-2024, 03:34 AM

yes, I reset all the settings with launch and ista +

razcat13 · 04-02-2024, 03:36 AM

the interesting thing is that it only works when the temperatures are low, if they are over 10 degrees celsius there are no more problems

03-29-2024, 03:38 PM	#1
razcat13 New Member 0 Rep 10 Posts Drives: BMW f30 Join Date: Feb 2024 Location: România iTrader: (0)	Drop idling n20 cold start Please can someone help me? I have a BMW 320, n20 engine, 184 HP, on the first cold start, only when decelerating does the idling decrease, drop, after which it recovers. The rest of the starts work fine. It has no error codes! For this problem, several parts were changed without success: -Thermostat -spark plugs - Bosch injectors -original BMW distribution - engine temperature sensor -MAF sensor Bosch -pvc valve -oxygen sensor 1 Bosch -fuel rail pressure sensor - high pressure pump -o-rings changed at intake -rocker cover gaskets changed All consumables and oil changed at 6000 km Premium fuel and BMW additive
	Appreciate 0 Tweet Quote

03-30-2024, 04:34 PM	#2
fe7565 Lieutenant Colonel 553 Rep 1,583 Posts Drives: 2012 BMW 328i N26 Join Date: Nov 2013 Location: United States iTrader: (0)	How did you check the error codes? Did you use ISTA+? After replacing components such as you described, the ECUs need to be reset. Did you try to reset the throttle and transmission adaptations with ITSA+? Not sure if these methods work: https://www.bmwfanatics.co.za/thread...n-reset.89895/ https://f30.bimmerpost.com/forums/sh...13&postcount=2 __________________ Help each other: if you manage to fix your issue (especially with help from this forum), don't be a d*ck and disappear. Follow-up by posting the solution so you can help others.
	Appreciate 0 Quote

04-02-2024, 03:34 AM	#3
razcat13 New Member 0 Rep 10 Posts Drives: BMW f30 Join Date: Feb 2024 Location: România iTrader: (0)	yes, I reset all the settings with launch and ista +
	Appreciate 0 Quote

04-02-2024, 03:36 AM	#4
razcat13 New Member 0 Rep 10 Posts Drives: BMW f30 Join Date: Feb 2024 Location: România iTrader: (0)	the interesting thing is that it only works when the temperatures are low, if they are over 10 degrees celsius there are no more problems
	Appreciate 0 Quote